I must brush you must brush she must brush we must brush you must brush they must brush
Forma con V-ing
I must be brushing you must be brushing she must be brushing we must be brushing you must be brushing they must be brushing
Perfecto
I must have brushed you must have brushed she must have brushed we must have brushed you must have brushed they must have brushed
Perfecto con V-ing
I must have been brushing you must have been brushing she must have been brushing we must have been brushing you must have been brushing they must have been brushing
Negación
Forma simple
I mustn't brush you mustn't brush she mustn't brush we mustn't brush you mustn't brush they mustn't brush
Forma con V-ing
I mustn't be brushing you mustn't be brushing she mustn't be brushing we mustn't be brushing you mustn't be brushing they mustn't be brushing
Perfecto
I mustn't have brushed you mustn't have brushed she mustn't have brushed we mustn't have brushed you mustn't have brushed they mustn't have brushed
Perfecto con V-ing
I mustn't have been brushing you mustn't have been brushing she mustn't have been brushing we mustn't have been brushing you mustn't have been brushing they mustn't have been brushing
Forma interrogativa
Forma simple
must I brush? must you brush? must she brush? must we brush? must you brush? must they brush?
Forma con V-ing
must I be brushing? must you be brushing? must she be brushing? must we be brushing? must you be brushing? must they be brushing?
Perfecto
must I have brushed? must you have brushed? must she have brushed? must we have brushed? must you have brushed? must they have brushed?
Perfecto con V-ing
must I have been brushing? must you have been brushing? must she have been brushing? must we have been brushing? must you have been brushing? must they have been brushing?
Forma interro-negativa
Forma simple
mustn't I brush? mustn't you brush? mustn't she brush? mustn't we brush? mustn't you brush? mustn't they brush?
Forma con V-ing
mustn't I be brushing? mustn't you be brushing? mustn't she be brushing? mustn't we be brushing? mustn't you be brushing? mustn't they be brushing?
Perfecto
mustn't I have brushed? mustn't you have brushed? mustn't she have brushed? mustn't we have brushed? mustn't you have brushed? mustn't they have brushed?
Perfecto con V-ing
mustn't I have been brushing? mustn't you have been brushing? mustn't she have been brushing? mustn't we have been brushing? mustn't you have been brushing? mustn't they have been brushing?